Yon can add a header element as
To customize the header for treemap drill-down, follow the given steps:
Step 1:
Initialize the treemap and enable the drill-down option.
<template>
<div>
<div id="header" style="background-color: #179bd7"></div>
<div class='control_wrapper'>
<ejs-treemap id='container' :dataSource="dataSource" weightValuePath="Population" format="n"
useGroupingSeparator="true" enableDrillDown="true" :palette="palette"
:leafItemSettings='leafItemSettings' :levels='levels'>
</ejs-treemap>
</div>
</div>
</template>
<script>
import Vue from 'vue';
import { TreeMapPlugin } from '@syncfusion/ej2-vue-treemap';
import { data } from './datasource.js';
Vue.use(TreeMapPlugin);
export default {
data () {
return {
dataSource: data,
palette: ["#9999ff", "#CCFF99", "#FFFF99", "#FF9999", "#FF99FF", "#FFCC66"],
levels: [
{
groupPath: 'Continent', border: { color: 'black', width: 0.5 },
},
{
groupPath: 'States', border: { color: 'black', width: 0.5 },
},
{
groupPath: 'Region', border: { color: 'black', width: 0.5 },
}
],
leafItemSettings: {
labelPath:'Name',
showLabels: false
}
}
},
}
</script>Step 2:
Show the population of a particular continent in the treemap loaded event. In this event, you can get the header element.
loaded:function(args) {
let header = document.getElementById('header');
var population = 0;
for (let i = 0; i < args.treemap.layout.renderItems[0]['parent'].Continent.length; i++) {
population += +(args.treemap.layout.renderItems[0]['parent'].Continent[i]['data'].Population);
}
header.innerHTML = 'Continent - Population : ' + population
}Step 3:
Customize the population for drilled countries or states in the header element when drill-down the treemap. The drillEnd event will be triggered when treemap is drilled.
<template>
<div>
<div id="header" style="background-color: #179bd7"></div>
<div class='control_wrapper'>
<ejs-treemap id='container' :dataSource="dataSource" weightValuePath="Population" format="n"
useGroupingSeparator="true" enableDrillDown="true" :palette="palette"
:leafItemSettings='leafItemSettings' :levels='levels' :drillEnd='drillEnd' :loaded="loaded">
</ejs-treemap>
</div>
</div>
</template>
<script>
import Vue from 'vue';
import { TreeMapPlugin } from '@syncfusion/ej2-vue-treemap';
import { data } from './datasource.js';
Vue.use(TreeMapPlugin);
export default {
data () {
return {
dataSource: data,
palette: ["#9999ff", "#CCFF99", "#FFFF99", "#FF9999", "#FF99FF", "#FFCC66"],
levels: [
{
groupPath: 'Continent', border: { color: 'black', width: 0.5 },
},
{
groupPath: 'States', border: { color: 'black', width: 0.5 },
},
{
groupPath: 'Region', border: { color: 'black', width: 0.5 },
}
],
leafItemSettings: {
labelPath:'Name',
showLabels: false
}
}
},
methods:{
drillEnd:function(args){
let header = document.getElementById('header');
let layout = document.getElementById("container_TreeMap_Squarified_Layout");
let population = 0;
if (args.treemap.layout.renderItems[0]['isDrilled']) {
for (let i = 0; i < args.treemap.layout.renderItems.length; i++) {
population += +(args.treemap.layout.renderItems[i]['data'].Population);
}
header.innerHTML = layout.children[0].children[1].innerHTML.split(']')[1] + ' - ' + population;
}
else if (args.treemap.layout.renderItems[0]['parent'].Continent) {
for (let i = 0; i < args.treemap.layout.renderItems[0]['parent'].Continent.length; i++) {
population += +(args.treemap.layout.renderItems[0]['parent'].Continent[i]['data'].Population);
}
header.innerHTML = 'Continent - Population : ' + population;
} else {
population = args.treemap.layout.renderItems[0]['data'].Population;
header.innerHTML = layout.children[0].children[1].innerHTML.split(']')[1] + ' - Population : ' + population;
}
},
loaded:function(args) {
let header = document.getElementById('header');
var population = 0;
for (let i = 0; i < args.treemap.layout.renderItems[0]['parent'].Continent.length; i++) {
population += +(args.treemap.layout.renderItems[0]['parent'].Continent[i]['data'].Population);
}
header.innerHTML = 'Continent - Population : ' + population
}
}
}
</script>export var data = [
{
Continent: [
{
Name: "Africa", Population: 1216130000, States: [
{
Name: "Eastern Africa", Population: 410637987, Region: [
{ Name: "Ethiopia", Population: 107534882 },
{ Name: "Tanzania", Population: 59091392 },
{ Name: "Kenya", Population: 50950879 },
{ Name: "Uganda", Population: 44270563 },
{ Name: "Mozambique", Population: 30528673 },
{ Name: "Madagascar", Population: 26262810 },
{ Name: "Malawi", Population: 19164728 },
{ Name: "Zambia", Population: 17609178 },
{ Name: "Zimbabwe", Population: 16913261 },
{ Name: "Somalia", Population: 15181925 },
{ Name: "South, Sudan", Population: 12919053 },
{ Name: "Rwanda", Population: 12501156 },
{ Name: "Burundi", Population: 11216450 },
{ Name: "Eritrea", Population: 5187948 },
{ Name: "Mauritius", Population: 1268315 },
{ Name: "Djibouti", Population: 971408 },
{ Name: "Réunion", Population: 883247 },
{ Name: "Comoros", Population: 832347 },
{ Name: "Mayotte", Population: 259682 },
{ Name: "Seychelles", Population: 95235 },
]
},
{
Name: "Middle Africa", Population: 158562976, Region: [
{ Name: "Democratic, Republic of the Congo", Population: 84004989 },
{ Name: "Angola", Population: 30774205 },
{ Name: "Cameroon", Population: 24678234 },
{ Name: "Chad", Population: 15353184 },
{ Name: "Congo", Population: 5399895 },
{ Name: "Central African, Republic", Population: 4737423 },
{ Name: "Gabon", Population: 2067561 },
{ Name: "Equatorial Guinea", Population: 1313894 },
{ Name: "Sao Tome and Principe", Population: 208818 },
]
},
{
Name: "Northern Africa", Population: 229385603, Region: [
{ Name: "Egypt", Population: 99375741 },
{ Name: "Algeria", Population: 42008054 },
{ Name: "Sudan", Population: 41511526 },
{ Name: "Morocco", Population: 36191805 },
{ Name: "Tunisia", Population: 11659174 },
{ Name: "Libya", Population: 6470956 },
{ Name: "Western, Sahara", Population: 567421 },
]
},
{
Name: "Southern Africa", Population: 64292365, Region: [
{ Name: "South Africa", Population: 57398421 },
{ Name: "Namibia", Population: 2587801 },
{ Name: "Botswana", Population: 2333201 },
{ Name: "Lesotho", Population: 2263010 },
{ Name: "Swaziland", Population: 1391385 },
]
},
{
Name: "Western Africa", Population: 362201579, Region: [
{ Name: "Nigeria", Population: 195875237 },
{ Name: "Ghana", Population: 29463643 },
{ Name: "Côte d'Ivoire", Population: 24905843 },
{ Name: "Niger", Population: 22311375 },
{ Name: "Burkina Faso", Population: 19751651 },
{ Name: "Mali", Population: 19107706 },
{ Name: "Senegal", Population: 16294270 },
{ Name: "Guinea", Population: 13052608 },
{ Name: "Benin", Population: 11485674 },
{ Name: "Togo", Population: 7990926 },
{ Name: "Sierra Leone", Population: 7719729 },
{ Name: "Liberia", Population: 4853516 },
{ Name: "Mauritania", Population: 4540068 },
{ Name: "Gambia", Population: 2163765 },
{ Name: "Guinea-Bissau", Population: 1907268 },
{ Name: "Cabo Verde", Population: 553335 },
{ Name: "Saint Helena", Population: 4074 },
]
},
]
}]
},
{
Continent: [
{
Name: "Asia", Population: 4436224000, States: [
{
Name: "Central Asia", Population: 69787760, Region: [
{ Name: "Uzbekistan", Population: 32364996 },
{ Name: "Kazakhstan", Population: 18403860 },
{ Name: "Tajikistan", Population: 9107211 },
{ Name: "Kyrgyzstan", Population: 6132932 },
{ Name: "Turkmenistan", Population: 5851466 },
]
},
{
Name: "Eastern Asia", Population: 1641908531, Region: [
{ Name: "China", Population: 1415045928 },
{ Name: "Japan", Population: 127185332 },
{ Name: "South Korea", Population: 51164435 },
{ Name: "North Korea", Population: 25610672 },
{ Name: "Taiwan", Population: 23694089 },
{ Name: "Hong Kong", Population: 7428887 },
{ Name: "Mongolia", Population: 3121772 },
{ Name: "Macao", Population: 632418 },
]
},
{
Name: "Southeastern Asia", Population: 641775797, Region: [
{ Name: "Indonesia", Population: 266794980 },
{ Name: "Philippines", Population: 106512074 },
{ Name: "Viet Nam", Population: 96491146 },
{ Name: "Thailand", Population: 69183173 },
{ Name: "Myanmar", Population: 53855735 },
{ Name: "Malaysia", Population: 32042458 },
{ Name: "Cambodia", Population: 16245729 },
{ Name: "Laos", Population: 6961210 },
{ Name: "Singapore", Population: 5791901 },
{ Name: "Timor-Leste", Population: 1324094 },
{ Name: "Brunei Darussalam", Population: 434076 },
]
},
{
Name: "Southern Asia", Population: 1846266634, Region: [
{ Name: "India", Population: 1354051854 },
{ Name: "Pakistan", Population: 200813818 },
{ Name: "Bangladesh", Population: 166368149 },
{ Name: "Iran", Population: 82011735 },
{ Name: "Afghanistan", Population: 36373176 },
{ Name: "Nepal", Population: 29624035 },
{ Name: "Sri Lanka", Population: 20950041 },
{ Name: "Bhutan", Population: 817054 },
{ Name: "Maldives", Population: 444259 },
]
},
{
Name: "Western Asia", Population: 262938009, Region: [
{ Name: "Turkey", Population: 81916871 },
{ Name: "Iraq", Population: 39339753 },
{ Name: "Saudi Arabia", Population: 33554343 },
{ Name: "Yemen", Population: 28915284 },
{ Name: "Syria", Population: 18284407 },
{ Name: "Azerbaijan", Population: 9923914 },
{ Name: "Jordan", Population: 9903802 },
{ Name: "United Arab Emirates", Population: 9541615 },
{ Name: "Israel", Population: 8452841 },
{ Name: "Lebanon", Population: 6093509 },
{ Name: "State of Palestine", Population: 5052776 },
{ Name: "Oman", Population: 4829946 },
{ Name: "Kuwait", Population: 4197128 },
{ Name: "Georgia", Population: 3907131 },
{ Name: "Armenia", Population: 2934152 },
{ Name: "Qatar", Population: 2694849 },
{ Name: "Bahrain", Population: 1566993 },
{ Name: "Cyprus", Population: 1189085 },
]
},
]
}]
},
{
Continent: [
{
Name: "North America", Population: 579024000, States: [
{
Name: "Central America", Population: 174988756, Region: [
{ Name: "Mexico", Population: 130759074 },
{ Name: "Guatemala", Population: 17245346 },
{ Name: "Honduras", Population: 9417167 },
{ Name: "El, Salvador", Population: 6411558 },
{ Name: "Nicaragua", Population: 6284757 },
{ Name: "Costa, Rica", Population: 4953199 },
{ Name: "Panama", Population: 4162618 },
{ Name: "Belize", Population: 382444 },
]
},
{
Name: "Northern America", Population: 358593810, Region: [
{ Name: "U.S.", Population: 3267667480 },
{ Name: "Canada", Population: 36953765 },
{ Name: "Bermuda", Population: 61070 },
{ Name: "Greenland", Population: 56565 },
{ Name: "Saint Pierre & Miquelon", Population: 6342 },
]
},
]
}]
},
{
Continent: [
{
Name: "South America", Population: 422535000, States: [
{ Name: "Brazil", Population: 204519000 },
{ Name: "Colombia", Population: 48549000 },
{ Name: "Argentina", Population: 43132000 },
{ Name: "Peru", Population: 31153000 },
{ Name: "Venezuela", Population: 30620000 },
{ Name: "Chile", Population: 18006000 },
{ Name: "Ecuador", Population: 16279000 },
{ Name: "Bolivia", Population: 10520000 },
{ Name: "Paraguay", Population: 7003000 },
{ Name: "Uruguay", Population: 3310000 },
{ Name: "Guyana", Population: 747000 },
{ Name: "Suriname", Population: 560000 },
{ Name: "French Guiana", Population: 262000 },
{ Name: "Falkland Islands", Population: 3000 },
]
},
]
},
{
Continent: [
{
Name: "Europe", Population: 738849000, States: [
{
Name: "Eastern Europe", Population: 291953328, Region: [
{ Name: "Russia", Population: 143964709 },
{ Name: "Ukraine", Population: 44009214 },
{ Name: "Poland", Population: 38104832 },
{ Name: "Romania", Population: 19580634 },
{ Name: "Crech, Republic", Population: 10625250 },
{ Name: "Hungary", Population: 9688847 },
{ Name: "Belarus", Population: 9452113 },
{ Name: "Bulgaria", Population: 7036848 },
{ Name: "Slovakia", Population: 5449816 },
{ Name: "Moldova", Population: 4041065 },
]
},
{
Name: "Northern Europe", Population: 103642971, Region: [
{ Name: "United Kingdom", Population: 66573504 },
{ Name: "Sweden", Population: 9982709 },
{ Name: "Denmark", Population: 5754356 },
{ Name: "Finland", Population: 5542517 },
{ Name: "Norway", Population: 5353363 },
{ Name: "Ireland", Population: 4803748 },
{ Name: "Lithuania", Population: 2876475 },
{ Name: "Latvia", Population: 1929938 },
{ Name: "Estonia", Population: 1306788 },
{ Name: "Iceland", Population: 337780 },
{ Name: "Channel Islands", Population: 166083 },
{ Name: "Isle of Man", Population: 84831 },
{ Name: "Faeroe Islands", Population: 49489 },
]
},
{
Name: "Southern Europe", Population: 152172107, Region: [
{ Name: "Italy", Population: 59290969 },
{ Name: "Spain", Population: 46397452 },
{ Name: "Greece", Population: 11142161 },
{ Name: "Portugal", Population: 10291196 },
{ Name: "Serbia", Population: 8762027 },
{ Name: "Croatia", Population: 4164783 },
{ Name: "Bosnia and Herzegovina", Population: 3503554 },
{ Name: "Albania", Population: 2934363 },
{ Name: "Macedonia", Population: 2085051 },
{ Name: "Slovenia", Population: 2081260 },
{ Name: "Montenegro", Population: 629219 },
{ Name: "Malta", Population: 432089 },
{ Name: "Andorra", Population: 76953 },
{ Name: "Gibraltar", Population: 34733 },
{ Name: "San Marino", Population: 33557 },
{ Name: "Holy, See", Population: 801 },
]
},
{
Name: "Western Europe", Population: 92746859, Region: [
{ Name: "Germany", Population: 82293457 },
{ Name: "France", Population: 65233271 },
{ Name: "Netherlands", Population: 17084459 },
{ Name: "Belgium", Population: 11498519 },
{ Name: "Austria", Population: 8751820 },
{ Name: "Switzerland", Population: 8544034 },
{ Name: "Luxembourg", Population: 590321 },
{ Name: "Monaco", Population: 38897 },
{ Name: "Liechtenstein", Population: 38155 },
]
},
]
}]
}
]